SPHAEROCERA IN CENTRAL AND SOUTH AMERICA — RICHARDS 229 



a looplike apical piece; sternites 1+2 (fig, 11) represented by three 

 small plates, aU about the same size, the central one usually very 

 transverse; sternite 3 angularly dumbbell shaped but narrower 

 posteriorly than anteriorly, the exact size and shape varying very 

 little; sternite 4 very transverse, approximately rectangular, with a 

 few short bristles; sternite 5 irregular, with a central membranous 

 emargination. 



Ecuador: Los Rios, Pichilingue, elev. 44 m., Feb. 2, 1955, holo- 

 tyi)8 and para type, cf , Ross and Schlinger, CAS. Paratypes: Panama 

 CanrJ Zone: Smnmit, September 1946, cf , N. H. L. Krauss, USNM. 

 Costa Rica: San Mateo, Higuito, cT macerated, Pablo Schild, USNM. 

 Mexico: Vera Cruz, Cordoba, Apr. 13, 1908, &, Dr. A. Feynes, 

 USNM. 



One of the Los Rios specimens is in my collection. 



Spliaerocera iParasphaerocera) chimborazo, new species 



Males and females. Generally like S. ecuadoria, new species, 

 but differs as follows: Legs slightly darker though still yellow brown. 

 Size slightly larger, length at least 3.0 mm. Facial plate raised into 

 a convex rounded boss, quite conspicuous in profile. Prosternum 

 consisting of a small posterior triangle, of which the tip is rounded 

 in the female, linear projection scarcely sclerotized. Legs somewhat 

 longer and less thickened, even in the cf, hindtibial spm- scarcely 

 detectable; cf forefemm* with a row of short outstanding ventral 

 bristles on proximal half. Abdominal spots somewhat larger. Male 

 genitalia rather large, with tergite in profile somewhat angularly 

 produced, evidently somewhat angularly emarginate, but most of the 

 structures hidden; sternites 1+2 (fig. 13) represented by a single 

 pea,r-shaped central spot; sternite 3 narrowly rectangular, very 

 slightly widened at each end ; sternite 4 generally rectangular, slightly 

 widened posteriorly, about twice as long as broad, produced spout- 

 like beneath the genitalia; sternite 5 hidden. Female with anterior 

 abdominal spot more produced at sides posteriorly than in male; 

 sternite 1+2 (fig. 14) as in cT, sternite 3 not sclerotized, sternite 4 

 more than twice as long as broad, somewhat narrowed at each end, 

 sternite 5 trapeziform, anterior and posterior margins straight, sides 

 somewhat concave; cerci oval, yellowish, with a moderate dorsal 

 and apical bristle. 



Ecuador: Chimborazo, Bugna, holotype cT, allotype 9, R. Levi- 

 Castnio, USNM type no. 66592. 



The sexes easily can be associated in this species by the structure 

 of the face and prosternum. 



